I think it is healthy for a marriage to have your OWN circle of friends.......people you can hang out with without your significant others maybe 2x a month (not asking for much i dont think). you shouldnt be joined at the hip 24/7.
There are different circles: one as a couple, one with your family, one with your friends (w/o hubby), one with his friends (w/o wife), and one with the couple and their friends (a couples night out or perhaps with the kids).
Agree 100%.